Oil burner tip



W. B. LANG ET AL Feb. 2, 1937- BURNER TI Filed May 25. 1935 Patented Feb. 2, 1937 UNI TED STATES PATENT OFFICE Claims.

This invention relates to liquid fuel burners and more particularly to the nozzle and its nebulizing details thereof.

It is the particular object of our invention to 5 provide a nozzle in which the nebulizing elements are specifically designed to ideally spray the liquid fuel for its function as a heating medium in such a manner that the formation of carbon on the exposed end of the nozzle when in use is practically eliminated.

It is another object of our invention that the parts comprising the nozzle shall be economical to manufacture, easy to clean, and readily assembled and disassembled.

1 5 Other objects and advantages will be apparent from the following description, wherein reference is made to the accompanying drawing illustrating the preferred embodiment of our invention, and wherein similar reference numerals 2O designate similar parts throughout the several views.

Fig. l is a longitudinal sectional view through the nozzle and the nozzle end of the burner pipe;

Fig. 2 is an outer end elevation of the clamping 25 nut; and

Fig. 3 is an outer end elevation of the nebulizer.

Referring now to Fig. l of the drawing, the burner nozzle H] has a threaded engagement H with the endof a liquid fuel supply pipe l2. The nozzle i0 comprises a clamping nut I3 of substantially cylindrical form having its pipe end |4 formed as a hexagon as shown in 2 and is further provided with a counterbore I5, a portion of which is internally threaded for the aforementioned threaded engagement H, and a bore I'B at its front end. An annular recess I! on the front face |8 communicates with the counterbo-re l5 through passageways I9. The front end is threaded externally for a threaded engagement 2|! with the nebulizer nut 2|.

The nebulizer nut 2| is preferably manufactured from a hexagon bar and is counterbored from the rear to provide for an internal thread for the aforementioned threaded engagement 20, and is provided at its front end with a bore 22, and is further provided with an annular recess 23 machined at the inner end of the internal thread toform a flange 24 having a rearwardly facing seat 25.

A burner'tip 26 of general cylindrical form has a flanged portion 21 formed by a portion 28 of reduced diameter extending forwardly through the bore 22 of the nebulizer nut 2|. The portion 28 extends outwardly beyond the forward end 55 of nebulizer nut 2| so that its face 29 is an appreciable distance forward thereof, and is preferably beveled off at its corner 30 to the depth of its overextensiont The forward face 3| of the flanged portion 21 is carefully machined to form a seal when in engagement with the face 25 5 of the nebulizer nut 2|, while the rear face 32 thereof is carefully machined at its outer portion to a bevel face 33. The burner tip 26 is counterbored from the rear to such diameter and depth that it becomes a cupped shell having an 1 inner cylindrical wall 34 and an inner transverse wall or face 35. The disc-like wall formed between the outer face 29 and the inner face 35 is provided with an aperture 36 enlarged conically at its inner end as at 31.

A nebulizer 38 is a cylindrical flanged plug in general form having a forward plug-like portion 39 of reduced diameter, a flanged portion 40, and a rear plug-like portion 4| of reduced diameter. The rear face 42 of the flanged portion 40 is preferably concaved slightly so as to assure of a leak-proof seal at its outer diameter when in engagement with the face N3 of the clamping nut l3. The forward face of the flanged portion 40 is cupped out to form an annular recess 43 surrounding the inner end of the portion 39, and comprises an outer transverse face 44 of nearly knife-edge proportions, a frusto-conica'l face 45, an inner transverse face or bottom 46, and the inner end of the cylindrical wall 41 formed by the reduced diameter portion 39'. A series of longitudinal apertures 48 pierce the flanged portion 4|] in uniform circumferential spacingthe said apertures 48 being conic'ally enlarged toward the face 42. The circumferential spacing of the apertures 48 is such that when in assembled relation therewith they are in opposed relation thereto the annular recess I! of the clamping nut I3. The forward" face 49 of the portion 39 has formed therein the recess 50 from which radiate the tangential grooves 51*.

When assembled the relationship of the burner tip 26 to the nebulizer 38 is such, that the inner face 35' and the bevel face 33 of the burner tip 26 contact simultaneously and respectively the forward face 49 and the frusto-conical face of the nebulizer 38-, and in this manner passageways are formed by the tangential grooves 51 communicating the passageway 52 with the aperture 36. The passageway 52 is-annular and is formed by having the diameter of the forward plug-like portion 39 of the nebulizer 38 smaller than that of the diameter of the wall 34 of the burner tip 26. At the same time the recess 43 forms an annular passageway com- 55 municating the apertures 48 with the passageway 52.

When in the proper assembled relation shown in Fig. 1, tightening of the threaded engagement 20 between the clamping nut l3 and the nebulizer nut 2| results in a clamping action between the forward face l8 of the clamping nut 13 and the seat 25 of the nebulizer nut 2|, which, by reason of the interposed parts-the burner tip 26 and the nebulizer 38, together with their interfitting relation as hereinbefore described, further results in a leak-proof condition throughout the nozzle I Uliquid can issue only at its intended aperture 36. In order to assure that the proper leak-proof seal is secured between the bevel face 33 of the burner tip 26 and the conical seat 45 of the nebulizer 38; a slight clearance is provided for between the bore 22 of the nebulizer nut 2! and the circumferential wall of the portion 28 of the burner tip 26 and between the bore l6 of the clamping nut 13 and the circumferential wall of the portion 4| of the nebulizer 38. This clearance compensates for mal-adjustment of centering of the respective parts due to manufacturing variations.

When in use liquid fuel under pressure is forced through the liquid fuel supply 12 and on through the burner nozzle [3 through the communicating passageways hereinbefore described until it emerges in the form of nebulized spray from the aperture 36.

It will be apparent to those skilled in the art that we have shown a specific type of nozzle, and that we have described and illustrated its various features in considerable specific detail for illustrative purposes, but we do not wish to be so limited, but may use such modification in, substitution for, or equivalent thereof, as are embraced within the scope of our invention or as pointed out in the claims.

Having thus described our invention what we claim as new and desire to secure by Letters Patent is:

l. A liquid fuel nozzle comprising a body with an exit, a nebulizer having a flanged portion overlying said body and having a passage communicating with said exit, and a forward hublike portion having a recess communicating with said passage by means of tangential grooves, a tip overlying said forward portion and having a discharge port in communication with said recess, and means for uniting the recited parts.

2. A liquid fuel nozzle comprising a body with an exit, a nebulizer having a flanged portion overlying said body and having a passage communicating with said exit, and a forward hublike portion comprising an end face and a peripheral wall, a recess in said face, and tangential grooves communicating said recess with said peripheral wall, a tip having a discharge port overlying said recess and a recess to the rear thereof and in communication therewith into which the said forward hublike portion extends, said second mentioned recess being of larger diameter than that of the said forward hublike portion whereby a passageway is formed communicating said tangential grooves with said passage, and means for uniting the recited parts.

3. A liquid fuel nozzle comprising a body having an inlet, an exit, and a centering bore, a nebulizer having a rear portion centered in said centering bore, a central flanged portion overlying said body and having a passage communicating with said exit, and a forward hublike portion comprising an end face and a peripheral wall, a recess in said face, and tangential grooves communicating said recess with said peripheral wall, a tip having a discharge port overlying said recess and a recess to the rear thereof and in communication therewith into which the said forward hublike portion extends, said second mentioned recess being of larger diameter than that of the said forward hublike portion whereby a passageway is formed communicating said tangential grooves with said passage, and means for rigidly securing tip, nebulizer, and body in assembled position.

4. A liquid fuel nozzle comprising a body having an inlet, an annular exit, a plurality of passageways communicating said inlet with said annular exit, and a centering bore, a nebulizer having a rear portion centered in said bore, a central flanged portion overlying said body having an annular recess on its forward face and a plurality of passageways communicating said annular recess with said annular exit, and a forward portion comprising an end face and a peripheral wall, a recess in said face and tangential grooves communicating said recess with said peripheral wall, a tip having a discharge port overlying said recess and a recess to the rear thereof and in communication therewith into which the said forward hublike portion extends, said second mentioned recess being of larger diameter than that of the said forward hublike portion whereby a passageway is formed communicating said tangential grooves with said annular recess, and means for rigidly securing tip, nebulizer, and body in assembled position.

5. A liquid fuel nozzle comprising a body having an inlet, an annular exit, a plurality of passageways communicating said inlet with said annular exit, and a centering bore, a nebulizer having a rear portion centered in said bore, a central flanged portion overlying and in engagement with said body having an annular recess with a beveled peripheral wall on its forward face and a plurality of passageways communicating said annular recess with said annular exit, and a forward portion comprising an end face and a peripheral wall, a recess in said face and tangential grooves communicating said recess with said peripheral wall, a tip having a discharge port overlying said recess, a recess in communication with said port into which the said forward portion extends whereby a passageway is formed communicating said tangential grooves with said annular recess, a rear flanged portion beveled on its rear outer periphery engaging said beveled peripheral wall, and the end wall formed by said second mentioned recess overlying and in engagement with said end face, and means for rigidly securing tip, nebulizer, and body in assembled position.

WALTER B. LANG. JOHN C. WOHLFARTH. 

